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Grade 31 Titanium vs. 8176 Aluminum

Grade 31 titanium belongs to the titanium alloys classification, while 8176 aluminum belongs to the aluminum alloys. There are 29 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is grade 31 titanium and the bottom bar is 8176 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
69
Elongation at Break, % 20
15
Fatigue Strength, MPa 300
59
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 41
26
Shear Strength, MPa 320
70
Tensile Strength: Ultimate (UTS), MPa 510
160
Tensile Strength: Yield (Proof), MPa 450
95

Thermal Properties

Latent Heat of Fusion, J/g 420
400
Maximum Temperature: Mechanical, °C 320
170
Melting Completion (Liquidus), °C 1660
660
Melting Onset (Solidus), °C 1610
650
Specific Heat Capacity, J/kg-K 540
900
Thermal Conductivity, W/m-K 21
230
Thermal Expansion, µm/m-K 8.7
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.4
61
Electrical Conductivity: Equal Weight (Specific), % IACS 6.9
200

Otherwise Unclassified Properties

Density, g/cm3 4.5
2.7
Embodied Carbon, kg CO2/kg material 36
8.2
Embodied Energy, MJ/kg 600
150
Embodied Water, L/kg 230
1190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 99
21
Resilience: Unit (Modulus of Resilience), kJ/m3 940
66
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
50
Strength to Weight: Axial, points 32
16
Strength to Weight: Bending, points 32
24
Thermal Diffusivity, mm2/s 8.5
93
Thermal Shock Resistance, points 39
7.0

Alloy Composition


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Aluminum (Al), % 0
98.6 to 99.6
Carbon (C), % 0 to 0.080
0
Cobalt (Co), % 0.2 to 0.8
0
Gallium (Ga), % 0
0 to 0.030
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.3
0.4 to 1.0
Nitrogen (N), % 0 to 0.050
0
Oxygen (O), % 0 to 0.35
0
Palladium (Pd), % 0.040 to 0.080
0
Silicon (Si), % 0
0.030 to 0.15
Titanium (Ti), % 97.9 to 99.76
0
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0 to 0.4
0 to 0.15